TMS320DM641 datasheet(104/179 Pages) TI

104 / 179 page

Clock PLL

104

June 2003 − Revised October 2005

SPRS222E

Table 4−19. Switching Characteristics Over Recommended Operating Conditions for AECLKOUT1 for the

EMIFA Module§#|| (see Figure 4−17)

NO.

PARAMETER

−400

−500

−600

UNIT

MIN

MAX

tw(EKO1H)

Pulse duration, AECLKOUT1 high

EH − 0.7

EH + 0.7

tw(EKO1L)

Pulse duration, AECLKOUT1 low

EL − 0.7

EL + 0.7

tt(EKO1)

Transition time, AECLKOUT1

td(EKIH-EKO1H)

Delay time, AECLKIN high to AECLKOUT1 high

td(EKIL-EKO1L)

Delay time, AECLKIN low to AECLKOUT1 low

§ E = the EMIF input clock (AECLKIN, CPU/4 clock, or CPU/6 clock) period in ns for EMIFA.

# The reference points for the rise and fall transitions are measured at VOL MAX and VOH MIN.

|| EH is the high period of E (EMIF input clock period) in ns and EL is the low period of E (EMIF input clock period) in ns for EMIFA.

kThis cycle-to-cycle jitter specification was measured with CPU/4 or CPU/6 as the source of the EMIF input clock.

AECLKIN

AECLKOUT1

Figure 4−17. AECLKOUT1 Timing for the EMIFA Module

Table 4−20. Switching Characteristics Over Recommended Operating Conditions for AECLKOUT2 for the

EMIFA Module†‡ (see Figure 4−18)

NO.

PARAMETER

−400

−500

−600

UNIT

MIN

MAX

tw(EKO2H)

Pulse duration, AECLKOUT2 high

0.5NE − 0.7

0.5NE + 0.7

tw(EKO2L)

Pulse duration, AECLKOUT2 low

0.5NE − 0.7

0.5NE + 0.7

tt(EKO2)

Transition time, AECLKOUT2

td(EKIH-EKO2H)

Delay time, AECLKIN high to AECLKOUT2 high

td(EKIL-EKO2L)

Delay time, AECLKIN low to AECLKOUT2 low

† The reference points for the rise and fall transitions are measured at VOL MAX and VOH MIN.

‡ E = the EMIF input clock (AECLKIN, CPU/4 clock, or CPU/6 clock) period in ns for EMIFA.

N = the EMIF input clock divider; N = 1, 2, or 4.

§ This cycle-to-cycle jitter specification was measured with CPU/4 or CPU/6 as the source of the EMIF input clock.

AECLKIN

AECLKOUT2

Figure 4−18. AECLKOUT2 Timing for the EMIFA Module

TMS320DM641 Datasheet(PDF) 104 Page - Texas Instruments

TMS320DM641 Datasheet(HTML) 104 Page - Texas Instruments

Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 ...More

Datasheet Download

Link URL